Table 1.

Summary of the intervention components (N=11).

Intervention	Population and behavior	Use parameters	Delivery mode	Behavior change technique	Theory
Active for Life [43]	Older adults aged ≥65 years who did not meet the recommendations for PAa PA	Duration of the intervention: 12 weeks Duration of each session: NRb Number of sessions: 6 Frequency: bimonthly	Automated function: tailored feedback on PA via the platform based on the participants’ characteristics Communicative function: none Additional modes: none	Instruction Goal setting Self-monitoring Action planning Prompts and cues Rewards and relapse prevention Social comparison Feedback	Theory of planned behavior Social cognitive theory
Active Plus [44,45]	Older adults aged ≥65 years who had at least one chronic disease that affects mobility and were able to walk 100 m without help PA	Duration of the intervention: 4 months Duration of each session: NR Number of sessions: NR Frequency: NR	Automated function: tailored advice on PA and feedback via email Communicative function: none Additional modes: list of local group activities	Instruction Action planning Coping planning Commitment Self-regulation Feedback	Theory of planned behavior Precaution adoption process Integrated model for change Self-regulation model
Active Plus 65 [46,47]	Older adults aged ≥65 years with an impairment in PA caused by a noncommunicable chronic disease PA	Duration of the intervention: 4 months Duration of each session: NR Number of sessions: NR Frequency: NR	Automated function: tailored advice on PA via email Communicative function: none Additional modes: list of local group activities and email	Instruction Problem solving Action planning Coping planning Awareness Feedback	I-Change Model Transtheoretical model Self-determination theory Self-regulation theory Health action process approach
eMind [51,52]	Community-dwelling older adults aged ≥65 years who presented a subjective memory complaint without dementia PA and nutrition	Duration of the intervention: 6 months Duration of each session: NR Number of sessions: NR Frequency: free access	Automated function: tailored exercise program, nontailored nutritional advice, and website link to a cognitive training Communicative function: chat with health professionals anytime and chat with a dietician for people at risk of nutritional deficiency Additional modes: none	Instruction Feedback Self-monitoring with activity tracker	NR
Healthy Ageing Supported by Internet and Community [38]	Older adults aged ≥65 years PA, nutrition, alcohol consumption, and social participation	Duration of the intervention: 10 weeks Duration of each session: NR Number of sessions: NR Frequency: NR	Automated function: information on physical (food and drink), social (preventing loneliness), and emotional (eg, self-esteem and resilience) health and videos Communicative function: chat forum Additional modes: none	Instruction and self-monitoring	NR
HATICEc [12,19,20,48-50]	Older adults aged ≥65 years with high cardiovascular risk Smoking, blood pressure, cholesterol, diabetes, weight, PA, and nutrition	Duration of the intervention: 18 months Duration of each session: NR Number of sessions: NR Frequency: NR	Automated function: tailored lifestyle and cardiovascular feedback, electronic diary, educational content, and peer-to-peer videos Communicative function: personal and automated feedback from a coach with the possibility to chat Additional modes: 12-month phone call and list of local group activities	Instruction Goal setting Self-monitoring Problem solving Automated and personal feedback	Motivational interviewing Transtheoretical model Social cognitive theory
Life Project [42]	Prefrail older adults aged 74 to 91 years PA	Duration of the intervention: NR Duration of each session: NR Number of sessions: NR Frequency: NR	Automated function: healthy lifestyle and PA information, exercise videos, and the possibility to create a tailored program Communicative function: none Additional modes: list of local group activities	Instruction	Self-determination theory
MyPlan 2.0 [41]	Older adults aged 65 to 80 years able to walk 100 m without help PA	Duration of the intervention: 5 weeks Duration of each session: NR Number of sessions: 5 Frequency: each week and free access	Automated function: information about PA, quiz about PA and benefits, and tailored feedback Communicative function: none Additional modes: email reminders	Instruction Computer-tailored feedback Goal setting Problem solving Action planning Self-monitoring	Self-regulation theory
Otago [39,40]	Community-dwelling older adults aged ≥65 years who were not frail PA	Duration of the intervention: 8 weeks Duration of each session: 30 to 40 minutes Number of sessions: 16 Frequency: 2 times per week	Automated function: exercise instruction and plan Communicative function: possibility to communicate with a coach and peers Additional modes: possibility to train with peers on the web	Instruction Feedback Self-monitoring Verbal persuasion	NR
No name [37]	Inactive older adults aged ≥65 years PA	Duration of the intervention: 2 months Duration of each session: 5 minutes Number of sessions: NR Frequency: every day	Automated function: exercise instruction and examples through an embodied conversational agent Communicative function: none Additional modes: implementation of the intervention in a clinic waiting room for 12 months	Instruction Self-monitoring Feedback Goal setting Problem solving	NR
No name [36]	Older adults aged ≥70 years with self-reported impaired balance, able to rise from a high chair and stand without support, and not active PA	Duration of the intervention: NR Duration of each session: NR Number of sessions: NR Frequency: NR	Automated function: tailored PA information, exercise video, and diary Communicative function: feedback from a physiotherapist, peer mentor meeting once a month, phone calls from a researcher after 2 to 3 weeks, and optional phone support Additional modes: first meeting in group, phone call, and face-to-face meeting	Instruction Action planning Self-monitoring Feedback from a therapist	NR

^aPA: physical activity.

^bNR: not reported.

^cHATICE: Healthy Ageing Through Internet Counselling in the Elderly.